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Titolo:
A simple explanation for the occurrence of the 1911 Morgan Hill earthquakein the stress shadow of the 1906 San Francisco earthquake
Autore:
Hori, T; Kaneda, Y;
Indirizzi:
Japan Marine Sci & Technol, Frontier Res Program Subduct Dynam, Yokosuka, Kanagawa 2370061, Japan Japan Marine Sci & Technol Yokosuka Kanagawa Japan2370061 2370061, Japan
Titolo Testata:
GEOPHYSICAL RESEARCH LETTERS
fascicolo: 11, volume: 28, anno: 2001,
pagine: 2261 - 2264
SICI:
0094-8276(20010601)28:11<2261:ASEFTO>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
LOMA-PRIETA EARTHQUAKE; HAYWARD FAULT; SOUTHERN-CALIFORNIA; LOWER CRUST; BAY-REGION; RUPTURE; CREEP; SLIP; SEISMICITY; INVERSION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
22
Recensione:
Indirizzi per estratti:
Indirizzo: Hori, T Japan Marine Sci & Technol, Frontier Res Program Subduct Dynam, Yokosuka, Kanagawa 2370061, Japan Japan Marine Sci & Technol Yokosuka Kanagawa Japan 2370061 Japan
Citazione:
T. Hori e Y. Kaneda, "A simple explanation for the occurrence of the 1911 Morgan Hill earthquakein the stress shadow of the 1906 San Francisco earthquake", GEOPHYS R L, 28(11), 2001, pp. 2261-2264

Abstract

We propose a new model to overcome an apparent stress shadow paradox. The stress shadow of the 1906 San Francisco earthquake was so effective in inhibiting earthquake activity that no M > 6 earthquakes occurred in the San Francisco Bay area for more than 70 years after the 1906 earthquake, with oneexception: the 1911 Morgan Hill earthquake. How could this earthquake occur only 5 years after the 1906 earthquake in an area where earthquake activity should have been inhibited? Our model is characterized by localized locked patches on the Morgan Hill segment of the Calaveras fault surrounded by steadily creeping patches. According to this model, the tectonic stressing rate on the Morgan Hill segment is so high that the stress shadow caused bythe 1906 earthquake can be dissipated within several years. This simple model is consistent with both the surface deformation data and the apparent earthquake recurrence at Morgan Kill, in contrast to two previous models which are either poorly constrained or have difficulty explaining such observations.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 31/03/20 alle ore 05:04:58